linux-kernel - Re: [PATCH v4 3/3] phy: phy-can-transceiver: Add support for generic CAN transceiver driver

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Message-ID: <20210416075109.yw3c47ii67gckeqd@pengutronix.de>
Date:   Fri, 16 Apr 2021 09:51:09 +0200
From:   Marc Kleine-Budde <mkl@...gutronix.de>
To:     Aswath Govindraju <a-govindraju@...com>
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-phy@...ts.infradead.org, linux-can@...r.kernel.org,
        Kishon Vijay Abraham I <kishon@...com>,
        Vinod Koul <vkoul@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Wolfgang Grandegger <wg@...ndegger.com>,
        Lokesh Vutla <lokeshvutla@...com>,
        Vignesh Raghavendra <vigneshr@...com>,
        Grygorii Strashko <grygorii.strashko@...com>
Subject: Re: [PATCH v4 3/3] phy: phy-can-transceiver: Add support for generic
 CAN transceiver driver

On 16.04.2021 10:56:47, Aswath Govindraju wrote:
> The driver adds support for generic CAN transceivers. Currently
> the modes supported by this driver are standby and normal modes for TI
> TCAN1042 and TCAN1043 CAN transceivers.
> 
> The transceiver is modelled as a phy with pins controlled by gpios, to put
> the transceiver in various device functional modes. It also gets the phy
> attribute max_link_rate for the usage of CAN drivers.
> 
> Signed-off-by: Aswath Govindraju <a-govindraju@...com>
> ---
>  MAINTAINERS                       |   1 +
>  drivers/phy/Kconfig               |   9 ++
>  drivers/phy/Makefile              |   1 +
>  drivers/phy/phy-can-transceiver.c | 146 ++++++++++++++++++++++++++++++
>  4 files changed, 157 insertions(+)
>  create mode 100644 drivers/phy/phy-can-transceiver.c
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> index e666d33af10d..4e868f2a97c7 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -4048,6 +4048,7 @@ T:	git git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next.git
>  F:	Documentation/devicetree/bindings/net/can/
>  F:	Documentation/devicetree/bindings/phy/ti,tcan104x-can.yaml
>  F:	drivers/net/can/
> +F:	drivers/phy/phy-can-transceiver.c
>  F:	include/linux/can/bittiming.h
>  F:	include/linux/can/dev.h
>  F:	include/linux/can/led.h
> diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
> index 54c1f2f0985f..51902b629fc6 100644
> --- a/drivers/phy/Kconfig
> +++ b/drivers/phy/Kconfig
> @@ -61,6 +61,15 @@ config USB_LGM_PHY
>  	  interface to interact with USB GEN-II and USB 3.x PHY that is part
>  	  of the Intel network SOC.
>  
> +config PHY_CAN_TRANSCEIVER
> +	tristate "CAN transceiver PHY"
> +	select GENERIC_PHY
> +	help
> +	  This option enables support for CAN transceivers as a PHY. This
> +	  driver provides function for putting the transceivers in various
> +	  functional modes using gpios and sets the attribute max link
> +	  rate, for mcan drivers.
                    ^^^^

CAN

Marc

-- 
Pengutronix e.K.                 | Marc Kleine-Budde           |
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